How to reduce image size without losing quality ? [2020]

You have finished writing your brand new blog post and want to add images .

Images make the blog post interesting, but also affect the page loading time as the image files are usually bigger in size and page load time is one of the most important SEO factors.

You do not have to be worried about the image size affecting your website page load time anymore.

In this post we will discuss how to reduce image size without losing quality.

The topics that we cover are :-

If you want to start a blog using a step by step tutorial check out my post :

How to start a blog in 2020

What should be the ideal size of image for a website?

An image with a lot of colours and details will always be larger in size than an black and white image.

We have to strike a balance, so that we can provide a good user experience without affecting the page load time too much.

As you see there is no such thing as an ideal image. But still there are few thumb rules that will keep you on the safer side.

  • The best image size that you require should be at least 1200 x 900 px.
  • Image size should not be more than 150 Kb
  • If you want to use larger images in the post body resize the image width to 900 px.
  • In case of featured images resize to a height of minimum 200 px and width of about 350 px. Otherwise the feature images will not show up nicely when shared on the social media
  • Rename images before you upload the photos to the site’s media library. Use appropriate prefixes or suffixes to differentiate between featured images and body post images. For example you can add -featured or -post etc.

How to reduce image size using GIMP?

Start GIMP

On the GIMP toolbar go to File > Open and select the image you want to resize


From the toolbar select Image > Scale Image

A Scale Image dialog box will open up as shown below

In the Image Size and Resolution options enter your new values.

  1. Change the width to 900 px
  2. Click on the chain icon, the height will auto update as per the width to maintain aspect ratio.
  3. Set the resolution value to 72
  4. Choose Interpolation method

The interpolation methods are used for removing any pixels in the image that are not used therefore reduce image size.

The options we have in GIMP are

Cubic or Bi-cubic – This method computes the colour of the new pixel by taking the average colour of the eight closest pixels. This method gives best result but will takes more time than other methods

Sinc(Lanczos3) – This method uses the Sinc mathematical function to perform a high quality interpolation

Click Scale to accept the changes.

In order to save the image File > Export As

How to reduce image size on Mac?

Open the file that you want to resize in the Preview app on your Mac

Next Choose Tools > Adjust Size.

Select the option Resample image.

In the Resolution option enter a lower value.

You can check the new size at the bottom of the app

If you need to reduce the size of multiple images at a go. You have to change preferences for opening image files

On your Mac in the Preview app, choose Preview > Preferences, the click on Images.

Choose an option in “When opening files” as “Open all the files in one window”.

Select all of the images in the window’s sidebar, now choose Tools > Adjust Size.

How to optimise image size with paint on window 10?

Paint is the most common and popular image editing tool available in Microsoft Windows.

We will be using Window 10 Paint to reduce the image size. The steps shown here are the same for all the Windows.

In window 10, open the Start Menu and scroll the list of apps to find the folder “Windows Accessories”. In this folder click on Paint app shortcut.


When the Paint app opens, go to Home > Image > Resize


In the window you will get two options to resize the image by Pixels or by Percentage.


If you select the Pixels option you will see the size of the original image displayed in Pixels in the boxes.

You can reduce the Pixels as per your requirement. But be sure that “Maintain Aspect Ratio” is checked. It helps in maintaining the width to height ratio.

After reducing the pixels you should save the file using the File menu. You can also use Save as options from the File menu to keep the original file unchanged.

How to compress image size in Photoshop without losing quality?

File > Open > select the image you want to resize.

Click on the Image tab in the top toolbar and in the drop down menu select Image Size

Check and measure the photo in Pixels.

Now you should resize the image to the required dimensions and then click OK.

Next open the File menu and Select the “Save for web” option.

Save the image in a JPEG format

Compress the file from 60 % to 80% and use the photo view on the left side to check the percentage of compression level. Higher the percentage better will be the quality of the image.

Click Save.

How to reduce the image size online?

If you don’t want to leave your browser for reducing the image size. You can go to resizeimage.net and compress your image.

Upload the image by clicking on the Upload an Image button.

In the second step you can crop your image to remove unwanted areas of the photo. Select Fixed aspect ratio and then change the width to less than 900 px.

In the option 4 Resize your image can resize your image by percentage or using

  1. Percentage
  2. Pixels

At last you can click on Resize Image button. You will be able to check the size of your old and new image. If the image size is less than 150 Kb you can download the image, otherwise tweak settings further until you get the desired result.

I hope you have now few ideas up your sleeve on how to reduce image size.

If you have anything I would love to hear from you

Spread the love

As a founder of Startblogpro, Bhagwant Singh helps the reader to launch a blog. A blog can be started as a side hustle and converted into a full-time business. Blogging as a business can help you to leave the 9-5 grind and be your own boss.

Leave a comment